Year	Number
1996	21.1055278778076
1998	18.5
2000	18.4079608917236
2002	21.8905467987061
2003	22.8855724334717
2004	20.1923084259033
2005	21.0526313781738
2006	26.3157901763916
2007	31.1004791259766
2008	35.5769233703613
2009	30.8056869506836
2010	28.9099521636963
2011	28.6384983062744
2012	27.2300472259521
2013	20.1877937316895
2014	13.942307472229
2015	13.3333330154419
2016	15.2380952835083
2017	14.7619047164917
2018	11.9047622680664
2019	16.6666660308838
2020	19.5238094329834
2021	19.5238094329834
2022	14.6226415634155